DK0925452T3 - Screw rotor set - Google Patents

Screw rotor set

Info

Publication number
DK0925452T3
DK0925452T3 DK97930285T DK97930285T DK0925452T3 DK 0925452 T3 DK0925452 T3 DK 0925452T3 DK 97930285 T DK97930285 T DK 97930285T DK 97930285 T DK97930285 T DK 97930285T DK 0925452 T3 DK0925452 T3 DK 0925452T3
Authority
DK
Denmark
Prior art keywords
pct
cavities
balancing
screw
rotors
Prior art date
Application number
DK97930285T
Other languages
Danish (da)
Inventor
Ulrich Becher
Original Assignee
Busch Sa Atel
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Busch Sa Atel filed Critical Busch Sa Atel
Application granted granted Critical
Publication of DK0925452T3 publication Critical patent/DK0925452T3/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/084—Toothed wheels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0042—Systems for the equilibration of forces acting on the machines or pump

Abstract

PCT No. PCT/CH97/00279 Sec. 371 Date Feb. 11, 1999 Sec. 102(e) Date Feb. 11, 1999 PCT Filed Jul. 21, 1997 PCT Pub. No. WO98/11351 PCT Pub. Date Mar. 19, 1998Known designs of single-thread screw rotors in single-piece cast iron constructions having wrap angles of >720 degrees with balancing cavities on the face of the screw operate with no unbalance at average rotary frequencies of ( DIFFERENCE 3000 min-1). The use of a pump in processes having sensitive purity and maintenance requirements or working with corrosive substances or where limited space is available and quality is demanded, brings about problems for rotor designing and balancing, which the present invention solves. An uneven mass distribution is accomplished by constructing the rotors with several single parts inside the rotor, by forming cavities and/or by choosing the adequate material, which, combined with the screw length/pitch ratio, cause a static and dynamic balancing. Screw rotors designed as described offer several advantages since they are easy to assemble and have a compact and stable construction. Moreover, they can be used in pumps for the food industry, chemistry, medicine and semi-conductor construction due to the flexibility in material and to the smooth surfaces free from cavities.
DK97930285T 1996-09-12 1997-07-21 Screw rotor set DK0925452T3 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH223396 1996-09-12
CH241796 1996-10-04
PCT/CH1997/000279 WO1998011351A1 (en) 1996-09-12 1997-07-21 Screw rotor set

Publications (1)

Publication Number Publication Date
DK0925452T3 true DK0925452T3 (en) 2002-12-30

Family

ID=25689859

Family Applications (1)

Application Number Title Priority Date Filing Date
DK97930285T DK0925452T3 (en) 1996-09-12 1997-07-21 Screw rotor set

Country Status (16)

Country Link
US (1) US6158996A (en)
EP (1) EP0925452B9 (en)
JP (1) JP4307559B2 (en)
KR (1) KR100509640B1 (en)
CN (1) CN1093228C (en)
AT (1) ATE222641T1 (en)
AU (1) AU714936B2 (en)
CA (1) CA2262898C (en)
CZ (1) CZ292634B6 (en)
DE (1) DE59708019D1 (en)
DK (1) DK0925452T3 (en)
ES (1) ES2180061T3 (en)
NO (1) NO991212L (en)
PT (1) PT925452E (en)
SK (1) SK28999A3 (en)
WO (1) WO1998011351A1 (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1026399A1 (en) * 1999-02-08 2000-08-09 Ateliers Busch S.A. Twin feed screw
KR100392405B1 (en) * 2000-06-13 2003-07-31 남기일 Screw type Vacuum pump having variable lead
CH694339A9 (en) * 2000-07-25 2005-03-15 Busch Sa Atel Twin screw rotors and those containing Ve rdraengermaschinen.
US7833250B2 (en) 2004-11-10 2010-11-16 Jackson Roger P Polyaxial bone screw with helically wound capture connection
US8377100B2 (en) 2000-12-08 2013-02-19 Roger P. Jackson Closure for open-headed medical implant
KR20030034804A (en) * 2001-10-27 2003-05-09 엘지전선 주식회사 A strucrure of deflected rotor bore center line for screw compressor
US11224464B2 (en) 2002-05-09 2022-01-18 Roger P. Jackson Threaded closure with inwardly-facing tool engaging concave radiused structures and axial through-aperture
GB0226529D0 (en) * 2002-11-14 2002-12-18 Dana Automotive Ltd Pump
GB2401400A (en) * 2003-05-08 2004-11-10 Automotive Motion Tech Ltd Pump with screw pitch less than 1.6 times the diameter
US7232297B2 (en) * 2003-05-08 2007-06-19 Automotive Motion Technology Limited Screw pump
GB2419920B (en) * 2004-11-08 2009-04-29 Automotive Motion Tech Ltd Pump
US8911479B2 (en) 2012-01-10 2014-12-16 Roger P. Jackson Multi-start closures for open implants
US8911478B2 (en) 2012-11-21 2014-12-16 Roger P. Jackson Splay control closure for open bone anchor
CN103203599B (en) * 2013-04-03 2017-07-28 威海智德真空科技有限公司 A kind of manufacture method of stainless steel hollow screw
CN105811647A (en) * 2014-12-31 2016-07-27 博世汽车部件(长沙)有限公司 Motor
CN105952636B (en) * 2016-05-05 2017-11-24 扬州大学 The capacity new-type double screw pump of self-lubricating supporting
US11536270B2 (en) 2018-08-29 2022-12-27 Hitachi Industrial Equipment Systems Co., Ltd. Screw rotor and screw-type fluid machine main body
CN114593049B (en) * 2020-12-04 2023-04-07 东北大学 Integrated internal spiral hollow screw rotor
GB2608379A (en) * 2021-06-29 2023-01-04 Edwards Ltd Screw-type vacuum pump
CN117514806A (en) * 2023-12-18 2024-02-06 坚固工业设备(杭州)有限公司 Rotor structure of vertical claw type dry vacuum pump, vertical vacuum pump and use method

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA487588A (en) * 1952-10-28 Dresser Industries Screw pump
US2266820A (en) * 1938-07-13 1941-12-23 Frank E Smith Engine
US2441771A (en) * 1941-05-31 1948-05-18 Jarvis C Marble Yieldable drive for rotors
GB670395A (en) * 1950-01-16 1952-04-16 Roots Connersville Blower Corp Improvements in or relating to rotary screw-pumps and motors
JPS62291400A (en) * 1986-06-10 1987-12-18 三井建設株式会社 Covering construction apparatus
JPS62291486A (en) * 1986-06-12 1987-12-18 Taiko Kikai Kogyo Kk Screw compressor
JPH01130084A (en) * 1987-11-13 1989-05-23 Hitachi Ltd Dynamic balance correction device
JPH02305393A (en) * 1989-05-19 1990-12-18 Hitachi Ltd Screw rotor and screw vacuum pump
US5348453A (en) * 1990-12-24 1994-09-20 James River Corporation Of Virginia Positive displacement screw pump having pressure feedback control
CA2058325A1 (en) * 1990-12-24 1992-06-25 Mark E. Baran Positive displacement pumps
WO1995002767A1 (en) * 1993-07-13 1995-01-26 Thomassen International B.V. Rotary screw compressor

Also Published As

Publication number Publication date
CN1093228C (en) 2002-10-23
CN1230242A (en) 1999-09-29
EP0925452B9 (en) 2003-02-26
CA2262898C (en) 2007-10-02
PT925452E (en) 2002-12-31
CZ9900755A3 (en) 2001-02-14
NO991212L (en) 1999-05-11
KR100509640B1 (en) 2005-08-23
KR20000035974A (en) 2000-06-26
SK28999A3 (en) 1999-12-10
JP2001503119A (en) 2001-03-06
EP0925452B1 (en) 2002-08-21
CA2262898A1 (en) 1998-03-19
WO1998011351A1 (en) 1998-03-19
EP0925452A1 (en) 1999-06-30
DE59708019D1 (en) 2002-09-26
CZ292634B6 (en) 2003-11-12
ATE222641T1 (en) 2002-09-15
US6158996A (en) 2000-12-12
AU3432297A (en) 1998-04-02
JP4307559B2 (en) 2009-08-05
AU714936B2 (en) 2000-01-13
NO991212D0 (en) 1999-03-11
ES2180061T3 (en) 2003-02-01

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